Sealing device for traveling-grate furnaces



June 2 4 19.24.

A. SCHNEIDER SEALING DEVICE FOR TRAVELING GgATE FURNACES Filed March 24', 1922 2 Sheets-Sheet 1 June 24 E524. m mm V .A. SCHNEIDER SEALING DEVICE FOR TRAVELING GRATE FURNACES Filed Maia-h 24. 1922 2 Sheets-Sheet 2 6H0: n e 1 Patented June 24, 1924.

res PATENT mm.

ADOLF scnivnrnnn, or ZELLSTOFFABRIK SEALING DEVICE FOR TRAVELING-GRATE FURNACES.

Application filed March 24, 1922. Serial No. 546,224.

To aZZ "whom it may concern.

Be it known that I, Anonr SCHNEIDER, a citizen of Germany, residing at Kehlheimon-the-Danube, in the State of Bavaria,

Germany, have invented certain new and useful Improvements in Sealing Devices for Traveling-Grate Furnaces; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as i will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to improvements in sealing devices for traveling grate furnaces. and more particularly in sealing devices of the type in which a rotary sealing member made in one or more sections is provided at the exit end of the grate. One of the objects of the improvements is to provide 2o. an apparatus of this class which is simple in construction and in which the sealing member or individual sections thereof can readily be replaced in case of wear. With this object in view my invention consists in constructing the sealing member in the form of a rotary prismatic or cylindrical body or drum rotatably suspended by means of flexible tension members trained about the same, and providing means for imparting rotary movement to the sealing member and permitting the same to be rocked towards and away from the grate in the direction of the longitudinal axis thereof. Other ohjects of the invention will be explained here inafter.

In order that the invention be more clearly understood several examples embodying the same have beenshown in the accompanying drawing, in which the same reference characters have been used in all the views to indicate corresponding parts. In said drawing,.

Fig. 1, is a longitudinal section of the furnace showing the rear end of the traveling grate and the sealing apparatus,

F 2, is a front view of one end of the sealing apparatus shown in Fig. 1, showing the furnace in cross-section,

Fig. 3, is a view of one end partly in section of the sealing member made in sections,

Fig. l, is a front view similar to that illustrated in Fig. 2 and showing a modification of the sealing apparatus, and

Fig. 5, is a horizontal section of the part of the furnace shown in Figs. 1 and 2 and showing a plan view of the grate and the I till sections are cylindrical in form and they consist of hollow bodies or drums. But I wish it to be understood, that I do not limit myself to the construction shown in the drawing, though I prefer to provide hollow bodies for the reasons, that such bodies are comparatively light in weight, that their cost is low, and that cooling media can effectively be applied thereto. Preferably the sections a are provided circumferentially with projections .7) in the form of points or pyramids. The sections are suspended from a shaft 9, and to the said shaft wheels f are keyed, and on the wheels and about the sections flexible suspension members are trained. Preferably such suspension 'members consist ofchains, and accordingly the wheels f are in the form of sprocket wheels, and the sections at are formed circumferentially with sprocket teeth 0 engaged by said chains.

I prefer to provide circumferential grooves in the sections a, as is best shown in Fig. 3. I' have found that thereby the teeth and the chains (Z are protected as against injury by heat and other causes in a more eflective way than in a construction in which the sprocket teeth are provided on the outer faces of the sections a. In addition such grooves provide'subsidiary means for guiding the chains 68' on the sections (i. At their ends the sections a are formed with end walls in the form of flanges e which prevent the passage of air between adjacent sections and the access of cinders to the inner parts of the sections, in case adjacent sections have been rocked out of alinement with each other. It will be understood that the flanges e have been shown merely by way of example.

The shaft 9 which carries the sprocket wheels f is suspended from a shaft 8, and it can be raised and lowered by turning the shaft 8. This is accomplished by pulleys 2' keyed to the shaft 8, and flexible members such as chains or ropes h wound on the pulleys and secured to the shaft 9. A worm I gearing lc adapted to be operated by a hand rocked 'in the direction of wheel Z is connected to the shaft 8 for turning the same and raising and lowering the sections a. Asit would be objectionable in some cases to freely suspend the shaft 9 from the shaft 5 to thereby permit it to be the axis of the grate, I provide means for locking the shaft 9 as against independent horizontalrocking movement. As shown in Figs. 1, 2 and 5 such means consist of rods t adapted to be placed in position between the shaft 9 and relatively fixed points such for example as a shaft 0. It will be understood that the rods tf do not interfere with the adjustment of the shaft 9 upwards and downwards. In the modification shown in Fig. 4c the shaft 9 is provided at both ends with bearing blocks 00 guided in vertical guide ways 1 made in the wall of the furnace, so thatit can not be oscillated horizontally, while it can be adjusted in vertical direction.

The sections a are preferably provided with rotating means. In my improved construction such means include the-members d by means of which the drums are suspended, the shaft g, and the wheels f keyed thereto. In the example shown in thefigures rotary movement is imparted to the shaft 9 from the traveling grate mechanism through the intermediary of chain andsprocket gearings m, n and p, t, q and the shaft 0. By this mechanism the sections a are rotated in a direction for sweeping the cinders traveling with the grate backwards. But I wish it to be understood that my invention is not limited to a construction in which the drums act on the cinders in opposition to. the grate, or in which the drums can be moved in one direction only. I prefer to dispose the chain t with a certain slack, and I key the wheels f, p, and g on their shafts with a certain free motion.

By means of the worm gearing 7c and cooperating parts the distance of the sealing sections a away from the surface of the traveling grate can be varied at will. Therefore I am enabled to remove the cinders while the grate is in operation.

As shown in Figs. 1, 2, 4 and 5, the sealing apparatus comprises covering plates 1) located between the sealing sections a and the transverse wall of the furnace for preventing the passage of the air between the said parts, and the said plates are formed at their rear edges to conform to the configuration of the sections a and the projections 6 provided thereon. Preferably the plate is provided with cooling ribs to to prevent injury fromheat. I also'prefer to provide the sections a internally with ribs Q01 for keeping down the temperature of the sealing sections a. Means are provided for applying a cooling medium such as'steam to the sections a. is shown a'slotted pipe 0* is passed longitudinally through said sections, and the sections are formed with slots 2 l ithin the sections there are balls 2 adapted upon rotation of the sections to disintegrate cinders which might get into the same.

While in describing the invention reference has been made to particular examples embodying the same, I wish it to be understood that my invention is not limited to the examples shown in the drawings, and that various changes may be made in the general arrangement of the apparatus and the construction of its parts without departing from the invention.

This application is a continuation in part of my copending application Serial No. 4cO3,504=, filed August 14:, 1920.

I claim:

1. In a furnace, the combination, with a traveling grate, of a sealing device provided at the exit end of the grate and comprising a cylindrical sealing member engaged by flexible members which form the sole support therefor and by means of which the sealing member is rotatably suspended.

2. In a furnace, the combination, with a traveling grate, of a sealing device provided at the exit end of the grate and comprising a cylindrical sealing member, and flexible members in the form of endless loops which form the sole support for the sealing mem her and by means of which the sealing memher is rotatably suspended.

3. In a furnace, the combination, with a traveling grate, of a sealing device provided at the exit end of the grate and comprising a cylindrical sealing member, flexible members in the form of endless loops which form the sole support of the sealing member and by means of which the sealing member is rotatably suspended, and means to actuate said flexible members for rotating the sealing member.

4. In a furnace, the combination, with a traveling grate, of a sealing device provided at the exit end of the grate and comprising a cylindrical sealing member formed with circumferential grooves, and flexible members in the form of endless loops trained on said sealing member within the grooves thereof and suspended for rotatably supporting the sealing member.'

5. In a furnace, the combination, with a traveling grate, of a sealing device provided at the exit end of the grate and comprising a sealing member formed with circumferential grooves, flexible members in the form of endless loops trained on said sealing member within the grooves thereof and suspended for rotatably supporting the sealing member, and means to actuate the flexible members for rotating the sealing member.

6. In a furnace, the combination. with a traveling grate, of a sealing device provided at the exit end of the grate and comprising a cylindrical sealing member made in sectlons in axial ahnement with one another and formed at their ad acent ends with end walls, and flexible members by means of which the sealing member is solely supported and rotatably suspended.

7. In a furnace, the combination, with a traveling grate, of a sealing device provided at the exit end of the grate and comprising a sealing member made in sections in axial alinement with one another and formed at their adjacent ends with air inlets in the end walls, and flexible tension members by means of which the sealingmember is rotatably suspended.

8. In a furnace, the combination, with a traveling grate, of a sealing device provided at the exit end of the grate and comprising a sealing member, flexible members in the form of endless loops by means of which the sealing member is solely supported and rotatably suspended, and means operatively connected with the traveling grate to actuate said flexible members for rotating the sealing member.

9. In a furnace, the combination, with a traveling grate, of a sealing device provided at the exit end of the grate and comprising a cylindrical sealing member, flexible members in the form of endless loops by means of which the sealing member is solely supported and rotatably suspended, and means operatively connected with the traveling grate to actuate said flexible members for rotating the sealing member, said means including a swinging member permitting vertical adjustment of the flexible members and sealing member.

10. In a furnace, the combination, with a traveling grate, of a sealing device provided at the exit end of the grate and comprising a'cylindrical sealing member, flexible members in the form of endless loops by means of which the sealing member is solely supported and rotatably suspended, and means operatively connected with the traveling grate to actuate said flexible members for rotating thesealing member, said means including a rotary shaft operatively connected with the traveling grate, and sprocket wheels and a slack chain intermediate said shaft and flexible members.

11. In a furnace, the combination, with a traveling grate, of a sealing device provided at the exit end of the grate and comprising a cylindrical sealing member made in sec tions in-axial alinement with one another and formed at their adjacent ends with end walls, flexible members in the form of endless loops by means of which the sectional sealing member is solely supported and rotatably suspended, and means operatively connected with the traveling grate for actuating said flexible members, said means comprising a rotary shaft connected with the grate, and sprocket wheels and chains is solely supported and rotatably suspended,

and means to raise and lower said flexible members.

13. In a furnace, the combination, with a traveling grate, of a sealing device provided at the exit end of the grate and comprising a cylinc rical sealing member, flexible memers in the form of endless loops by means of which the sealing member is solely supported and rotatably suspended, means to actuate said flexible members for rotating the sealing member, and means to raise and lower said flexible members.

14. In a furnace, the combination, with a traveling grate, of a sealing device provided at the exit end of the grate and comprising a cylindrical sealing member made in sections in axial alinement with one another and formed at their adjacent ends with end walls, flexible members in the form of end less loops by means of which the sectional sealing member is solely supported and rotatably suspended, means operatively connected with the traveling gratefor actuating said flexible members, said means comprising a rotary shaft connected with the grate, and sprocket Wheels and chains connecting the shaft with the flexible members, and means to raise and lower said flexible members.

15. In a furnace, the combination with the brick work of the furnace having a portion of its inner face rising vertically near the rear end of the grate, and a traveling grate, of a sealing device provided at the exit end of the grate and comprising a cylindrical sealing member having a plurality of projections, a plate intermediate the sealing member and adjacent the vertical wall of the brick work and having its edge resting on the sealing member and shaped to permit passage of the projections, and flexible members by means of which the sealing member is solely supported and rotatably suspended.

16. In a furnace, the combination with the brick work of the furnace having a portion of its inner face rising vertically near the rear end of the grate, and a traveling grate, of a sealing device provided at the exit end of the grate and comprising a cylindrical sealing member having a plurality of projections, a plate intermediate the sealing member and adjacent the vertical wall of the brick work and having its edge resting on the sealing member and shaped to permit passage of the projections and con- FIG forming to the external form of the sealing member and its projections and formed with cooling ribs, and flexible members by means of which the sealing member is solely supported and rotatably suspended.

17. In a furnace, the combination, with a traveling grate, of, a sealing device provided at the exit end of the grate and comprising a cylindrical sealing member internally formed with cooling ribs, and flexible members by means of which the sealing member is solely supported and rotatably suspended. v v

18. In a furnace, the con'ibination, with a traveling grate, of a sealing device provided at the exit end of the grate and comprising a sealing member provided circumferentially with projections, and flexible members by means of which the sealing mem her is rotatably suspended.

19. In a furnace, the combination, with a traveling grate, of a sealing device provided at the exit end of the grate and comprising a cylindrical sealing drum, crushing bodies within said drum, and'flexible members by means of which the sealing member is rotatably suspended.

20. In a furnace, the combination, with a traveling grate, of a sealing device provided at the exit end of the grate and comprising a cylindrical sealing member, a rotary shaft having a sprocket wheel mounted thereon, said shaft being supported to permit a certain free motion, flexible members in the form of endless loops by means of which said sealing member is solely suspended from said shaft, and means for rotating said shaft including a drive chain engaging said sprocket wheel.

21. In a furnace, the combination with a traveling grate of a sealing device provided at the exit-end of the grate and comprising a plurality of rotatable sections arranged in alineinent, and means for supporting said rotatable sections so as to permit them to bodily swing fore-and-aft.

22. In a furnace, the combination with a traveling grate of a sealing device provided at the exit end of the grate and comprising a sealing structure cylindrical in form and rotatable on its axis, and means for suspending said sealing structure so as to permit it to swing fore-and-aft from a point above the axis of the sealing structure.

23. In a furnace, the combination with a tra *eling grate of a sealing device provided at he exit-end of the grate and comprising a rotatable sealing structure arranged above the rear-end of the grate, overhead suspending means for said sealing structure to permit the same to swing fore-andaft, and means for bodily adjusting vertically the suspending means and the rotatable sealing structure.

In testimony whereof I hereunto afiiX my signature in the presence of two witnesses.

DR. A DOLF SCHNEIDER. Witnesses PAUL Dnnv, RICHARD LUTZ. 

